{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "It is concluded therefore that , unlike the ventrolateral B3 cells which mediate a methyldopa - induced hypotension via descending projections , the midline serotonin B3 cells in the medulla contribute to the hypotensive action of methyldopa , either by way of an ascending projection which does not pass through the median forebrain bundle , or through a projection restricted to the caudal brainstem ."}
{"Disease": ["hypotension", "hypotensive"], "Chemical": ["methyldopa", "serotonin"]}